FakeStandby VS NewPipe

And, if you use FakeStandby with screen lock disabled, you can run it without having to be worried about the battery.

If you wish to avoid burnin try Fake Standby . If latest version is not working as expected you can try previous version

Maybe this https://fakestandby.jonasbernard.de/

Found this on F-Droid: https://github.com/JonasBernard/FakeStandby

FakeStandby (version 1.3.2): Turn off your screen while keeping apps running

Here is my pick: -aurora store download apk of apps from the googleplay store. -fdroid a store for opensource apps. -aria2 to use as an advance feature rich download manager and can use to torrent. -package manager is good for when installing apkm and exporting things. -sd maid to clean unwanted folders and dead files, generally clean the phone's storage. -pdf converter might be the best app to work with pdfs. -open resources read and download books for free, also they have an audio book app too. -mindustrycool game that i like, just recommending. -vlc an ad and hassle free audio-video player. -zee archiver another choice to zarchiver. -data eraser cb phones don't really need tools like this and using without understanding is harmful to the phone. -ocr ad free and opensource ocr app. -multi filerename does what it's name says. -stealth feature rich reddit client, can be found in fdroid. -fritter twitter client. newpipe feature rich no ad youtube client. -droid splitter splits files, can be buggy sometimes but does it's job. -onlyoffice-collabora microsoft office alternative. -binary eye qr code scanner. -video transcoder transcode video. -open link with cool link tool. -touch protecter protect from accidental touches when you don't want them. -fake stand by kinda like the one above but this one saves energy. -proexpense advance miney manager. Welp thats some of my pick and sorry for the lack of upper caped characters.

I use FakeStandby "An Android app for turning the screen off while keeping apps running." for many different applications. I'd assume it would work for your purpose as well. https://github.com/JonasBernard/FakeStandby/

Just use NewPipe. It's just a better Youtube client even if it had ads.

https://newpipe.net/

I have a 3G device still able to watch YT and a very old Kindle Fire that has NewPipe [1] installed for watching YT in bed (whilst my phone is on charge).

I don't see why not either - if the device was capable of H264 when it was released, why not now?

[1] https://newpipe.net/

There is nothing you can do yourself as an app user, see https://github.com/TeamNewPipe/NewPipe/issues/9764. The current situation will be improved by https://github.com/TeamNewPipe/NewPipe/pull/10580.

NewPipe

NewPipe on Android is also unaffected.